RIOT-OS/RIOT
RIOT-OS/RIOT
1
0
Fork 0
mirror of https://github.com/RIOT-OS/RIOT.git synced 2024-12-29 04:50:03 +01:00
Code Releases Activity

core/byteorder: Add byteoder_htobebufll & inverse

Browse Source 
- Add `byteorder_bebuftohll()` to read an 64 bit value from a big endian buffer
- Add `byteorder_htobebufll()` to write an 64 bit value into a big endian buffer
This commit is contained in:
Marian Buschsieweke 2020-08-14 10:21:50 +02:00
parent 030e0af985
commit 81d40d3f66
No known key found for this signature in database
GPG Key ID: 61F64C6599B1539F
1 changed files with 61 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

61
core/include/byteorder.h
View File

@ -251,6 +251,19 @@ static inline uint16_t byteorder_bebuftohs(const uint8_t *buf);
*/
static inline uint32_t byteorder_bebuftohl(const uint8_t *buf);
/**
* @brief Read a big endian encoded unsigned integer from a buffer
* into host byte order encoded variable, 64-bit
*
* @note This function is agnostic to the alignment of the target
* value in the given buffer
*
* @param[in] buf position in a buffer holding the target value
*
* @return 64-bit unsigned integer in host byte order
*/
static inline uint64_t byteorder_bebuftohll(const uint8_t *buf);
/**
* @brief Write a host byte order encoded unsigned integer as big
* endian encoded value into a buffer, 16-bit
@ -275,6 +288,18 @@ static inline void byteorder_htobebufs(uint8_t *buf, uint16_t val);
*/
static inline void byteorder_htobebufl(uint8_t *buf, uint32_t val);
/**
* @brief Write a host byte order encoded unsigned integer as big
* endian encoded value into a buffer, 64-bit
*
* @note This function is alignment agnostic and works with any given
* memory location of the buffer
*
* @param[out] buf target buffer, must be able to accept 8 bytes
* @param[in] val value written to the buffer, in host byte order
*/
static inline void byteorder_htobebufll(uint8_t *buf, uint64_t val);
/**
* @brief Convert from host byte order to network byte order, 16 bit.
* @see byteorder_htons()
@ -506,6 +531,24 @@ static inline uint32_t byteorder_bebuftohl(const uint8_t *buf)
#endif
}
static inline uint64_t byteorder_bebuftohll(const uint8_t *buf)
{
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
return (((uint64_t) buf[0] << 56)
| ((uint64_t) buf[1] << 48)
| ((uint64_t) buf[2] << 40)
| ((uint64_t) buf[3] << 32)
| ((uint64_t) buf[4] << 24)
| ((uint64_t) buf[5] << 16)
| ((uint64_t) buf[6] << 8)
| ((uint64_t) buf[7] << 0));
#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
/* big endian to big endian conversion is easy, but buffer might be
* unaligned */
return unaligned_get_u64(buf);
#endif
}
static inline void byteorder_htobebufs(uint8_t *buf, uint16_t val)
{
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
@ -532,6 +575,24 @@ static inline void byteorder_htobebufl(uint8_t *buf, uint32_t val)
#endif
}
static inline void byteorder_htobebufll(uint8_t *buf, uint64_t val)
{
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
buf[0] = (uint8_t)(val >> 56);
buf[1] = (uint8_t)(val >> 48);
buf[2] = (uint8_t)(val >> 40);
buf[3] = (uint8_t)(val >> 32);
buf[4] = (uint8_t)(val >> 24);
buf[5] = (uint8_t)(val >> 16);
buf[6] = (uint8_t)(val >> 8);
buf[7] = (uint8_t)(val >> 0);
#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
/* big endian to big endian conversion is easy, but buffer might be
* unaligned */
memcpy(buf, &val, sizeof(val));
#endif
}
#ifdef __cplusplus
}
#endif